Abstract: A method for controlling the magnitude of mechanical forces exerted by a solid ammonia storage material on walls of a container: determining a mechanical-strength limit of the container in terms of a hydraulic pressure PLIMIT or force FLIMIT under which the walls of container do not undergo plastic deformation, or deformation of more than 200% of deformation at the yield point; using a correlation between a temperature TSAT for the ammonia saturation/resaturation process, and the hydraulic pressure PMAT, or FMAT generated by the storage material during saturation/resaturation, to identify a minimum temperature TSATMIN where PMAT, or FMAT is kept below the limit for the mechanical strength by carrying out the saturation/resaturation process at the temperature TSAT fulfilling the condition of TSAT?TSATMIN.